Hoisting apparatus.



w. BL POTTER.

HOISTING APPARATUS.. PrLroATzon FILED AUG. 1,1904.

PATBNTBD MAB. 27, ma.

2 SHEETS-SHEET l.

ACCL.

No. 816,372. PATENTED MAR. 27, 1906. w. B. POTTLR.v

'HOISTING APPARATUS. APPLIoATIoN FILED AUG. 1.1904.

2 SHEETS-SHEET 2.

55 y '54 32 f3' .o 129 s-f :57

.Z2/7 ze WITNESSES z INVENTQR:

UNITE@ STATES PATENT WILLIAM B. Porras; or scrisnscranr, New rosa,AssIeNoR ro GEN- ERAL Erincrnrc conranr, A ceeronarion or New Yoan, y

l Specification of Letters Patent.

Patented March 2'?, 1906.

Application filed August 1, 1901i. Serial No. 218,98g.

To (1f/ZZ whom it may concern:

Be it known that I, WILLIAM B. POTTER, a

'citizen of the United States, residing at Schenectady, in vthe countyof Schenectady and State of New York, have invented certain new anduseful Improvements in Hoisting Apparatus, of which the following is aspecification. t 1 Y My invention relates to hoisting apparatus, andmore especially to the type ot' hoisting Vapparatus employed inconnection ,with the ,during each operation or employ so` manymanually-operated partsthat regulation of the driving means wasimpracticable, and as a consequence -electric motors when used as a`driving means have not proven so economical as in other places wherethey were not subjected to sudden and frequent reversals and wereproperly regulated.l

The object of the present invention is to lprovide al hoisting apparatushaving its parts sol constructed and arranged that it may be propelledby a unidirectional driving means and its several operations and itsspeed readily and simultaneouslycontrolled and regulated by a singleoperator. f

-In carrying out my invention l provide separate drums forv the hoistingand operating cables, means controlled byasingle manually-operated partfor causing one or both of the drums to engage or disengage the drivingmechanism, and means for .braking one of the drums controlled by asecond manuallyoperated part. The speed of the motorl is regulatedeither simultaneously withv the braking action by means of a directconnection with the brake-lever or independently l by means of afoot-lever.

The invention will be more readily under-` 5o apparatus embodying one1form of my invention. Fig. is a longitudinal section through Y the mainfriction-gear and adjacent ends of the cable-drums. Fig.' 3 is adiagrammatic representation oi the'electrical connections of the motor,and Fig. 4 shows my hoisting device installed in an ordinary coal-pier.-

The device shown in the drawings comprises the main hoisting-drum 1 andthe operating-.drum 2, mounted loosely upon a common shaft 3, carried inbearings 4, The drums 1 and 2 are Yeach'provided, at one end u withfriction-surfaces 5 in the shape of a frustrated cone projecting fromthe faces 5 of the drums 1 and 2 is the frictiongear 7, havingfriction-surfaces 8 on itsopposite sides adapted to lcooperate with thesurfaces 5. Between .the end ofthe hoistingdrum l and the gear 7 is ashoulderedsleeve 8 also feathered to theshaft 3, and-surrounded by ahelical spring 9, engaging the side ofthe mg to normally .hold thehoisting-druml 1 pressed away from the gear 7, so that when the drum lisforced axially toward the gear 7 the .spring 9 acts at first to forcethe gear along the shaftl into 'engagement with the operating-drum 2 andthen upon further travel of the hoisting-drum it yields to permit thedruml and the gear? to frictionallyfengage,

The means formoving 'the hoisting-drum 1 toward the gear 7 consists oftoggleflevers 1'0 10, pivoted to collars 11 11,.mounted loosely on theshaft 3. between the end 'of the hoisting-drum l and a collar 12, fixedto thel shaft, the operating-drum 2 being held from longitudinalmovement by a corresponding fixedcollar 12', and the toggle-levers 10 10are con-,

one arm of a bell-crank-13, which is connected by its other arm to a.lconne,cting-rodv 13, engaging a hand-lever 14, provided with a rack anddetent. The means for frictionally braking' the'hoisting-drum 1 when thebucket'is in' raised from the outer lend of the hoisting-druml l and'surrounded by a brake-strap 16, contlanged head 6. Loosely feathered tothey shaft 3 lbetween the opposedlriction-surgear and the shoulder ofthe sleeve and .act-v -nected at their common joint with a yoked' link13, which connects at its lower end with positionv and for 'controllingthey lowering thereoiv consists of a collar 15, projecting,

nected to a lbell-crank 17, actuated by a sec'- i .other end to arack-rod 24, engaging the brakinCr o eration bv n'ieans 1 u b n n Jplvoted at 23, and jointed at connecting-rod 19 of' the a Lo 25,-onf'the movable nie'inber of the yA foot-lever 26 is provided for indcontrol of the rheostet, the lever 22 o ng di yConnected et such timesfrom the renie-r 'br-removal 0f the bolt 27' When thefdeviee abovedescribed is inn stalled 1n a coal-pier, es indieeted in Fig. Ll, anindependent mechanism 2S is employed for running in and out oi' thebucket, Consistfreed rotates in areveY ing'ofa single drum operatingupon a cable 2S?, which passes to a sh'eave 3U the end of a boom-runner32 in the usual ins i., The bucket-operating Cable end the hoi zing--Cable 34 pass from. their respective drums 2 and 1 to a shesve at thetop of tlieniast Se down over sheaves 37, carried by the boom runner 32to the bue/lie ts 38( The operation is substantially follows: Assumingthe bucket to be open and resting upon the coal in the barge, the motoris excited by throwing brake-lever 18 forward or by pressing upon thefoot-lever 2o, when lever 22 is disconnected, and friction-g beinggeared to the motor is et. once ser in 1notion. Lever 14 is then drawnback part vier' to bring;r 'the gear 'I into engagement w h theoperating-drum 2, which is thereby ro* *ed to take up sutlieient lengthof cable te close the buelet 355. Then the lever 111 is drawn back stillfarther, causing the hoisting drurn 1 to overcome Vthe tension of thespring 9 and engage gear 7. Thereupon both drun'is are Caused to rotzlrein unison to hoist the bucket until it raised to the desired iq'ht. Thelever 1S is then drawn beek to brake the hoisting-drum 1 and shut ofithe eurrent from the motor, the running-out druin having meanwhile beenreleased to the bucket to travel into g yion aber-'e the hoppers 3Q,whereupon the lever 1% forward Vto release the operating end il i drumsand 1 from the friction-gear 7 bucket being sustained by ineens or'brake 1S, while the operstingdrnin being 'D e direction, the bnelret 38to open and dise hopper 39. The running-oi drinn 28 again actuated todrew Ytne becket out to position over the berge, where `t is rerinit--ted 'to descend under control or ,en--

brake 1G.V i i ro be noted that the operations of raisn Asch-erging,lowering, and Closing the buelret are entirely controlled b v tivolevers 14 and 1.8 and the power of the unidirec- 1 rrr-titer esorequlated simultaneously therewith or, wllen ired, ,by a third lever2513, so that a single o; irntion may control these several operationsWithout releasing any one lever in order 'to manipulate another.

While have shown .and described rny ini applied to partI nlsij kind of,g apneratns, it is apparent that it is in no way restricted thereto norto the devices shown und deseril'ied herein.

fi/l t l'. eliriin as new, and desire to secure 4, ers Patent of theUnited States, is 1. r lire eonibination of two druins, means 'ng seiddrums, sind means Controlled by e single .lever for causing one or both.of seid drums to engage said driving nies-ns.

2. The combination of two drums, friction means for driving said drums,and ineens 4Controlled bv s single lever for causing one or both ol:said drums to irotionally engage said driving means.

3. The coin bin ation of two drums, friction rneans for driving saiddrums, means nornally operating to hold one of said drums n t of Contactwith said driving means, sind a single means adapted to force one orboth of seid drums into engagement with said driving means.

l1. The combination of a hoisting-drum and an operating-drum, frictionineens for driving' both of seid drums, ineens normally noting to holdsaid hoisting-drnin out of contact with said driving means, and a singlenieens adapted on part movement to force the operetingwlrurn intoengagement with the driving ineens and upon further nieveinent to forceboth drinne into engagement with said driving means.

5. The combination of a shaft supnorted at its e ds, two drums mountedon said shaft and provided with i'riotioneurliaees at their adjacentends, Wheel provided with corresponding irietiowsurisees looselyfeathered on seid shaft between said drums, a s ,ring loeeted betweenseid Wheel and one o said d .is to normally hold said Wheel out `of enteet therewith end in Contact with the onor drinn, end e. thrust devioefor moving l ing-pressed drinn .into engagement with said Wheel.

The eonibination of' two drums, means or dr iving said drums, meanscontrolled by le lever for Causing one or both of said o engagije saiddriving ineens, and a eviee ror IOO IOS

IIO

driving means, means operated by a single lei In Witness whereof I havehereunto set my ver adapted upon part movement to force l hand this 29thday of July, 1904. lthe operating-drum into engagement with l WLLTAM BPOTTER said driving means and upon further move- 5 ment to Jforce thehoisting-drum into engage- Witnesses: ment with said driving means, anda brake i BENJAMIN B. HULL,

device engaging saidhoistng-drum. 'l HELENv ORF-OPT.

